RFR: 8340141: C1: rework ciMethod::equals following 8338471

[Dean Long]

On Tue, 1 Oct 2024 21:23:28 GMT, Vladimir Ivanov <vlivanov at openjdk.org> wrote:

> > JVMTI can add and delete methods
> 
> Can you elaborate on that point, please? JVMTI spec states that redefinition/retransformation "must not add, remove or rename fields or methods" [1] [2].
> 
> [1] https://docs.oracle.com/en/java/javase/23/docs/specs/jvmti.html#RedefineClasses [2] https://docs.oracle.com/en/java/javase/23/docs/specs/jvmti.html#RetransformClasses

It's because of the AllowRedefinitionToAddDeleteMethods flag:

https://github.com/openjdk/jdk/blob/7312eea382eed048b6abdb6409c006fc8e8f45b4/src/hotspot/share/prims/jvmtiRedefineClasses.cpp#L928

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PR Comment: https://git.openjdk.org/jdk/pull/21148#issuecomment-2400635053